88 lines
2.9 KiB
Python
88 lines
2.9 KiB
Python
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import requests
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from django.shortcuts import reverse
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from django.contrib.auth.backends import ModelBackend, UserModel
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from boofilsic.settings import MASTODON_DOMAIN_NAME, CLIENT_ID, CLIENT_SECRET
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from common.mastodon.api import *
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class OAuth2Backend(ModelBackend):
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""" Used to glue OAuth2 and Django User model """
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# "authenticate() should check the credentials it gets and returns
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# a user object that matches those credentials."
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# arg request is an interface specification, not used in this implementation
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def authenticate(self, request, token=None, username=None, **kwargs):
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""" when username is provided, assume that token is newly obtained and valid """
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if token is None:
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return
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if username is None:
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user_data = get_user_data(token)
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if user_data:
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username = user_data['username']
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else:
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# aquiring user data fail means token is invalid thus auth fail
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return None
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# when username is provided, assume that token is newly obtained and valid
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try:
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user = UserModel._default_manager.get_by_natural_key(user_data['username'])
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except UserModel.DoesNotExist:
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return None
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else:
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if self.user_can_authenticate(user):
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return user
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return None
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def obtain_token(request, code):
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""" Returns token if success else None. """
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payload = {
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'client_id': CLIENT_ID,
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'client_secret': CLIENT_SECRET,
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'redirect_uri': f"http://{request.get_host()}{reverse('users:OAuth2_login')}",
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'grant_type': 'authorization_code',
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'code': code,
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'scope': 'read write'
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}
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url = 'https://' + MASTODON_DOMAIN_NAME + OAUTH_TOKEN
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response = requests.post(url, data=payload)
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if response.status_code != 200:
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return
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data = response.json()
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return data.get('access_token')
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def get_user_data(token):
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url = 'https://' + MASTODON_DOMAIN_NAME + VERIFY_ACCOUNT_CREDENTIALS
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headers = {
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'Authorization': f'Bearer {token}'
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}
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response = requests.get(url, headers=headers)
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if response.status_code != 200:
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return None
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return response.json()
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def revoke_token(token):
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payload = {
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'client_id': CLIENT_ID,
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'client_secret': CLIENT_SECRET,
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'scope': token
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}
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url = 'https://' + MASTODON_DOMAIN_NAME + REVOKE_TOKEN
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response = requests.post(url, data=payload)
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def verify_token(token):
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""" Check if the token is valid and is of local instance. """
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url = 'https://' + MASTODON_DOMAIN_NAME + VERIFY_ACCOUNT_CREDENTIALS
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headers = {
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'Authorization': f'Bearer {token}'
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}
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response = requests.get(url, headers=headers)
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if response.status_code == 200:
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res_data = response.json()
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# check if is local instance user
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if res_data['acct'] == res_data['username']:
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return True
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return False
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